| Bonnesvalyn | |
| Commune Status: | Commune |
| Arrondissement: | Château-Thierry |
| Canton: | Villers-Cotterêts |
| Insee: | 02099 |
| Postal Code: | 02400 |
| Mayor: | Stéphane Frère[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Région de Château-Thierry |
| Coordinates: | 49.1228°N 3.3175°W |
| Elevation M: | 115 |
| Elevation Min M: | 100 |
| Elevation Max M: | 210 |
| Area Km2: | 6.34 |
Bonnesvalyn is a commune in the department of Aisne in Hauts-de-France in northern France.